Sound is a crucial engine in any movie, but it’s the big-scale, layered soundscapes that tend to get the most awards attention. This year, the carefully calibrated sound in war drama “Dunkirk” is crucial for this almost-silent, radically-structured action movie. And each time Ryan Gosling’s K in “Blade Runner” or Ansel Elgort’s Baby Driver enters a new landscape, the sound design clues us into what’s going on.